"SoThink" is a good, free .flv downloader. I used to rely on downloadhelper for Firefox but the older versions don't seem to work so well anymore.

__________________"well since im a Crack head alchoholic I cant Count and i dont have a 5th grade education.. SO being drunk right now I cant comment in a coherent fashion.." ~ Dat1111, June 26, 2008 http://forums.liveleak.com/showpost.php?p=229218&postcount=12

I use a free program called Freemake video downloader. It's somewhat simple but does have a few options such as ,Download and convert or just download and change as to what type of file you want to download it as. That didnt make much sense did it? hahaha.
Sorry,i just copy/paste the url in the box ,click download and it works. thats pretty much all i know. Oh and it's free.
It say's Freemake.com in the upper right corner but i think i got it from cnet. Good luck.